Infection, usually by a virus, is the most common cause of lymph node swelling. Other causes include inflammatory diseases, abscesses, and cancer. ... This biopsy is done to find out why a node is swollen. ... Groin; Armpit; Neck; Under the jaw and chin; Behind the ears. ...
Soldering - Soldering has the same definition as brazing except for the fact that the filler metal used has a liquidus below 840Â°F (450Â°C) and below the solidus of the base metals.
We can define brazing as the joining of metals through the use of a heat and a filler metal. In this process the melting temperature of the brazing filler metal is above 840Â° F (450Â° C), but in all cases below the melting point of the metals being joined.